Contact US

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Can't see broadcast message on UDP

Can't see broadcast message on UDP

Can't see broadcast message on UDP

I am sending a UDP broadcast message from a pc to a VxWorks box with 3 cards, each connected to the network. One of the cards is behind an ethernet switch. The two cards without the switch receive the broadcast message but the card with the switch does not. Can send a unicast message directly the card's IP address and receive it. Have set the subnet mask the same on the offending card as the cards that do receive the broacast message. Is there any obvious reason why this would happen? Any idea on what to look for?

RE: Can't see broadcast message on UDP

I would look for the make and model number of the switch. I am unsure how we can help with a part we cannot identify. (You have direct wired the offending port and it works without the switch?)

I tried to remain child-like, all I achieved was childish.

Tsar of all the Rushers

RE: Can't see broadcast message on UDP

Problem fixed. Found out that it is a Marvell Prestera-DX switch. There are bit settings on the switch to allow bridging of multicast packets. Got those set correctly and can now receive broadcast messages. If anyone is interested in further details I would be happy to reply.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close